Harvey Tool 38720-C6 Ball End Mill 0.50mm 2 Flute Solid Carbide

Product Description

The HARVEY TOOL 38720-C6 is a solid carbide ball end mill engineered for finish milling in hardened steels and other demanding workpiece materials. The tool features a 0.50 mm cutting diameter, a 1/64 inch (0.40 mm) length of cut, and a 2-flute spiral geometry with a 20-degree right-hand helix. An AlTiN Nano PVD coating provides thermal resistance and surface hardness at the cutting edge, making this end mill suited for high-speed finishing passes where tool life and dimensional accuracy are critical. The straight cylindrical shank measures 1/4 inch in diameter. Machinists and tool-and-die professionals working with hardened workpieces typically specify this tool.

This end mill belongs to the Harvey Tool End Mills for Hardened Steels - Finishers - Ball series. It is intended for finishing operations on hardened materials, with secondary suitability for steel, stainless steel, and cast iron. The extended-reach geometry and stub-length cut make it appropriate for tight-tolerance profiling, slotting, and contouring in die cavities, mold features, and precision components where a fine surface finish is required. The centercutting design permits direct plunge entry. Single-end configuration maximizes rigidity at this micro-diameter range.

Key Features

• 0.50 mm ball cutting diameter with a nose radius of 0.0100 inches for fine finish work
• AlTiN Nano PVD coating for thermal and wear resistance in hardened material applications
• 2-flute, right-hand spiral geometry at 20-degree helix angle
• Centercutting design supports direct plunge milling
• Extended reach with a 0.1000 inch reach length and 0.0840 inch neck length
• 1/4 inch straight cylindrical shank with h6 diameter tolerance for precise toolholder fit
• Mill diameter tolerance of +0.0000 / -0.0006 inches for tight dimensional control

Compatibility

Designed for use on hardened steels as the primary workpiece material, with secondary compatibility for steel, stainless steel, and cast iron. Suitable for use in standard 1/4 inch collet chucks, end mill holders, or shrink-fit toolholders with h6 bore tolerance.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with CNC milling equipment and micro-diameter tooling. Ensure the spindle and toolholder are clean and within runout tolerance before seating the shank, as micro-diameter end mills are sensitive to setup error. Confirm coolant-through is not required for this tool; external coolant or air blast is appropriate. Follow the machine tool manufacturer and tooling series guidelines for speeds, feeds, and depth-of-cut recommendations when cutting hardened materials.